Sunland Park is a city in southeastern Doña Ana County, New Mexico, United States, on the borders of Texas and the Mexican state of Chihuahua, with Ciudad Juárez adjoining it on the south and El Paso, Texas, on the east. The community of Santa Teresa adjoins it on the northwest. The population of Sunland Park was 14,106 at the 2010 census and was estimated at 17,978 by the United States Census Bureau in 2019.